Facebook Data Miner - How Much is Information Worth?

How much is the information in facebook's database worth? Presumably, facebook is trying to convert a user's information into dollars. Traditionally, this task is called advertising - but I don't think advertising is the right word anymore.

Can someone point me to the revenue of (1) blanket advertising (2) targeted advertising. Finally, (3) does the targeted advertising from google differ from the targeted advertising on facebook? My intuition says yes, but I'm not sure I understand why. Sorry, this is more of a take than give post, but I'm hoping it might spur some interesting discussion.